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Arthur Stanley Eddington
Sir Arthur Stanley Eddington (28 December 1882 – 22 November 1944) was an English astronomer, physicist, and mathematician. He was also a philosopher of science and a populariser of science. The Eddington limit, the natural limit to the luminosity of stars, or the radiation generated by accretion onto a compact object, is named in his honour. Around 1920, he foreshadowed the discovery and mechanism of nuclear fusion processes in stars, in his paper "The Internal Constitution of the Stars".The Internal Constitution of the Stars A. S. Eddington The Scientific Monthly Vol. 11, No. 4 (Oct., 1920), pp. 297–303 At that time, the source of stellar energy was a complete mystery; Eddington was the first to correctly speculate that the source was fusion of hydrogen into helium. Eddington wrote a number of articles that announced and explained Einstein's theory of general relativity to the English-speaking world. World War I had severed many lines of scientific communication, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eddington Number
In astrophysics, the Eddington number, , is the number of protons in the observable universe. Eddington originally calculated it as about ; current estimates make it approximately . The term is named for British astrophysicist Arthur Eddington, who in 1940 was the first to propose a value of and to explain why this number might be important for physical cosmology and the foundations of physics. History Eddington argued that the value of the fine-structure constant, ''α'', could be obtained by pure deduction. He related ''α'' to the Eddington number, which was his estimate of the number of protons in the universe. This led him in 1929 to conjecture that ''α'' was exactly 1/136. He devised a "proof" that NEdd = 136 × 2256, or about 1.57×1079. Other physicists did not adopt this conjecture and did not accept his argument. In the late 1930s, the best experimental value of the fine-structure constant, ''α'', was approximately 1/137. Eddington then argued, from aesthetic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kendal, Westmorland
Kendal, once Kirkby in Kendal or Kirkby Kendal, is a market town and civil parish in the South Lakeland district of Cumbria, England, south-east of Windermere and north of Lancaster. Historically in Westmorland, it lies within the dale of the River Kent, from which its name is derived. At the 2011 Census, the town had a population of 28,586, making it the third largest town in Cumbria after Carlisle and Barrow-in-Furness. It is renowned today mainly as a centre for shopping, for its festivals and historic sights, including Kendal Castle, and as the home of Kendal Mint Cake. The town's grey limestone buildings have earned it the sobriquet "Auld Grey Town". Name ''Kendal'' takes its name from the River Kent (the etymology of whose name is uncertain but thought to be Celtic) and the Old Norse word ''dalr'' ("valley"). Kendal is listed in the Domesday Book as part of Yorkshire with the name Cherchebi (from Old Norse ''kirkju-bý'', "church-village"). For many centuries it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Draper Medal
The Henry Draper Medal is awarded every 4 years by the United States National Academy of Sciences "for investigations in astronomical physics". Named after Henry Draper, the medal is awarded with a gift of USD $15,000. The medal was established under the Draper Fund by his widow, Anna Draper, in honor of her husband, and was first awarded in 1886 to Samuel Pierpont Langley "for numerous investigations of a high order of merit in solar physics, and especially in the domain of radiant energy". It has since been awarded 45 times. The medal has been awarded to multiple individuals in the same year: in 1977 it was awarded to Arno Allan Penzias Arno Allan Penzias (; born April 26, 1933) is an American physicist, radio astronomer and Nobel laureate in physics. Along with Robert Woodrow Wilson, he discovered the cosmic microwave background radiation, which helped establish the Big Bang th ... and Robert Woodrow Wilson "for their discovery of the cosmic microwave radiation (a remnant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Medal Of The Royal Astronomical Society
The Gold Medal of the Royal Astronomical Society is the highest award given by the Royal Astronomical Society (RAS). The RAS Council have "complete freedom as to the grounds on which it is awarded" and it can be awarded for any reason. Past awards have been given for "outstanding personal researches in the fields of astronomy and geophysics" as well as general contributions to astronomy and geophysics "that may be made through leadership in research programmes, through education and through scientific administration". It has been awarded both for research that has taken a lifetime (it has most frequently been given to recognise an extraordinary lifetime achievement), and for specific pieces of research. History The RAS was founded in 1820 and the first Gold Medals were awarded in 1824. Silver medals were also awarded in 1824 and 1827, but that practice was quickly abandoned, instead the RAS established other awards. In the early years, more than one medal was often awarded in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Astronomical Society (Whatever shines should be observed) , predecessor = , successor = , formation = , founder = , extinction = , merger = , merged = , type = NGO, learned society , status = Registered charity , purpose = To promote the sciences of astronomy & geophysics , professional_title = Fellow of the Royal Astronomical Society (FRAS) , headquarters = Burlington House , location = Piccadilly, London , coords = , region_served = , services = , membership = , language = , general = , leader_title = Patron , leader_name = King Charles III , leader_title2 = President , leader_name2 = Mike Edmunds , leader_title3 = Executive Director , leader_name3 = Philip Diamond , leader_title4 = , leader_name4 = , key_peo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
